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Finding the Fourth Proportional to 260.71, 359.61 and 172.15

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Solution

The fourth proportional to 260.71, 359.61 and 172.15 is: 237.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.71 : 359.61 = 172.15 : x
  2. Step 2: Convert to fraction form
    260.71/359.61 = 172.15/x
  3. Step 3: Cross multiply
    260.71x = 359.61 × 172.15
  4. Step 4: Simplify right side
    260.71x = 61,905.32
  5. Step 5: Solve for x
    x = 61,905.32/260.71
  6. Step 6: Final answer
    x = 237.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.